Microsoft deprecates password payload in MPR notifications starting in Windows 11 24H2

Since Microsoft likes to use initialisms without explaining them, the Multiple Provider Router (MPR) is the component that handles communication betweek Windows and the various network providers that are installed. Network providers are libraries (DLLs) that allow communication to other types of networks. These network providers can also act as credential managers, so they can receive a copy of the user's credentials. Slipping a rogue network provider (e.g., NPPSpy) into the mix could leak your credentials.